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Comus Lake
Enhanced dataInteractive depth contours
Comus LakeWalworth County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Modeled depth estimate · Not a survey · Not for navigation
Source: LakeList depth modelmedium confidence · QA passed · Select a contour to inspect its mapped depthModeled depth estimate: contours computed from the lake's shoreline shape and its documented 6-ft maximum depth (depth grows with distance from shore, calibrated to the documented mean depth where available). This is a smooth mathematical model, not a survey - real holes, bars, and drop-offs will differ. Community sonar (C-MAP Genesis) overlays where recorded. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Comus Lake.
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Fishing forecast
Best windows for Comus Lake
Weather-based planning built from the National Weather Service hourly forecast near this lake.
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Checking wind, precipitation, and near-term weather windows.
Water temperature
Comus Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
79°FPeak summer
Seasonal estimate. Checking current National Weather Service air temperatures…
Warmest water of the year. Fish hold deeper or feed in low light; swimming and watersports are at their best.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
Wisconsin DNR water assessment
Impaired waterbody listed
The DNR lists this waterbody as impaired. This notice is not itself a closure; review the official assessment and current guidance before your trip.
303(d) / impairment recordRecreation restrictions noted
Excess Algal Growth, EutrophicationPollutants: Total Phosphorus
- Status
- 303d Listed
- Public health
- General Advice
- Recreation
- Recreational Restrictions
- Aquatic life
- Not specified
Water is impaired due to one or more pollutants and associated quality impacts.
Review DNR water quality Check consumption advice Source updated 2026-03-25 · LakeList verified 2026-07-12
DNR water check
Water quality quick take
From Wisconsin DNR / Citizen Lake Monitoring readings at Comus Lake - Deep Hole.
Last sampled Jul 2023Volunteer monitoring since 2018
Through 2023, murky, algae-prone water — summer clarity of 1.4 ft ranks among the lowest of monitored Wisconsin lakes.
Based on July–August 2021 averages across 7 volunteer readings.Water claritySecchi disk depth
1.4 ftJul–Aug 2021 avg (3 readings)
MurkyImproving — up ~29% vs earlier years
Clearer than 1% of 596 monitored Wisconsin lakes with current readings.
AlgaeChlorophyll-a
90 µg/LJul–Aug 2021 avg (2 readings)
HighStable since 2000
NutrientsTotal phosphorus — fuels plant & algae growth
226 µg/LJul–Aug 2021 avg (2 readings)
HighWorsening — up ~46% vs earlier years
High phosphorus points to heavy plant/algae growth pressure.
All readings by year · station details · methodology
Summer averages (July/August)
July/August means; counts in parentheses show how many samples went into each average.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2023 | — | — | 254.0 µg/L (1) |
| 2022 | — | — | 412.0 µg/L (1) |
| 2021 | 1.4 ft (3) | 90.0 µg/L (2) | 226.0 µg/L (2) |
| 2020 | 1.2 ft (3) | 108.5 µg/L (2) | 146.0 µg/L (2) |
| 2019 | 1.2 ft (2) | 118.0 µg/L (2) | 159.0 µg/L (2) |
| 2018 | 1.3 ft (2) | — | — |
| 2002 | 0.7 ft (1) | 145.0 µg/L (1) | 305.0 µg/L (1) |
| 2000 | 1.0 ft (1) | 76.0 µg/L (1) | 206.0 µg/L (1) |
| 1978 | 1.0 ft (1) | — | — |
Latest individual samples: Secchi 1.3 ft (2021-08-24), chlorophyll-a 73 µg/L (2021-08-24), and total phosphorus 254 µg/L (2023-07-18).
Secchi clarity is how deep a black-and-white disk stays visible from the surface — more feet means clearer water.
Chlorophyll-a is an algae pigment; higher values signal more algae in the water column.
Total phosphorus is a nutrient that feeds algae and aquatic plants. It is not a weed survey — depth, bottom type, water movement, and management change the actual lake experience.
Comus Lake - Deep HoleStation 653286
Modeled from DNR/CLMN monitoring — not a safety or swim-condition report. Verify current conditions locally. LakeList verified 2026-07-12.Official Wisconsin information
Plan with DNR sources
LakeList links to the authoritative record so you can verify maps, rules, and current notices before leaving.
Historical DNR depth maps1 converted map sheetView DNR depth mapHistorical map · not for navigationFishing regulationsVerify current seasons, limits, and restrictionsOfficial DNR lake pageFacts, advisories, boating, and water qualityWater quality reportsMonitoring stations, clarity, and DNR reportsInvasive speciesVerified, observed, and historical AIS recordsBoating ordinancesLocal slow-no-wake and water-use restrictionsFish consumption advisoriesStatewide and waterbody-specific health guidance
Historical depth maps are not for navigation. Verify regulations and access at the official source before your trip.
Historical Wisconsin DNR maps
Comus Lake depth maps
1 converted map sheet. These historical surveys are not for navigation.
Navigable depth map
Comus Lake · sheet 1
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 794200 · image navigation only; spatial alignment pending · Historical lake maps are not for navigation.
Source: Wisconsin Department of Natural Resources. Converted for browser access with source URLs, checksums, and retrieval dates retained. Historical lake maps are not for navigation.
131surface acres
6max depth feet
1public access points
42.6432, -88.6398latitude, longitude
Access
Public access points
Boat launchComus Lake Boat Ramp42.63767, -88.64977Managed by CITYCITY OF DELAVANRamp surface: Concrete PlankADA-accessible feature: YesVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassNorthern PikePanfish
Depth FAQ
How deep is Comus Lake?
Comus Lake is 6 feet deep at its deepest point and averages about 4 feet, according to Wisconsin DNR records.
Is there a free depth map of Comus Lake?
Yes. LakeList publishes a free interactive depth contour map of Comus Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from LakeList depth model survey data.
Where does the Comus Lake depth map come from?
The interactive depth contours are derived from LakeList depth model. Each contour set passes a visual QA review against the source document before it is published. The depths are a modeled estimate calibrated to the lake's documented maximum depth - not a survey, and not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-14
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